Solar panels in Seville

Modelled output of a 6 kWp system at 35° facing south (towards the equator), from PVGIS climate data (PVGIS-SARAH3, 2005 to 2023).

• Best month: July (939 kWh). Weakest: December (654 kWh), a 1.4x difference.
• May, July, August produce 28.8% of the year; February, November, December produce 20.8%.
• Year-to-year variation: about 225 kWh (2.3%, one standard deviation).
• Sunlight reaching the panels: 2,201 kWh per m² a year.

Rules set by the city or its region, on top of the national scheme. Each one was checked against the official source on the date shown.

• City of Seville

  IBI rebate for solar panels

  Seville's 2026 property tax (IBI) ordinance gives a 50% rebate for residential properties with solar systems, for the three tax years after the installation starts operating. It must be requested by 1 March of the tax year it applies to, and it does not apply to installations required by the city's energy and climate ordinance.

  Source: Boletín Oficial de la Provincia de Sevilla / Agencia Tributaria de Sevilla, BOP Sevilla nº 249, 29-12-2025: Aprobación definitiva de la modificación de las ordenanzas fiscales para 2026 (CVE BOP-SE-2025-249021) (checked 2026-09-25)

• City of Seville

  ICIO construction tax rebate for solar

  Seville's construction tax (ICIO) ordinance for 2026 gives a 75% rebate for works whose only purpose is adding solar systems for self-consumption, unless the installation is mandatory under the city's energy ordinance.

  Source: Boletín Oficial de la Provincia de Sevilla / Agencia Tributaria de Sevilla, BOP Sevilla nº 249, 29-12-2025: Aprobación definitiva de la modificación de las ordenanzas fiscales para 2026 (CVE BOP-SE-2025-249021) (checked 2026-09-25)

Seville ranks 1 of 4 for yield among the cities we model in Spain, and 4 of 41 across every country on Solar Figures. Within one country the prices are the same, so a payback gap between these cities comes from sunshine alone.

Closest yield abroad: Perth (1,618 kWh per kWp), Marseille (1,563 kWh per kWp), Delhi (1,552 kWh per kWp).

Power you use yourself is worth the retail price (€0.21 per kWh); power you export earns €0.06. So the share you use at home, by running appliances in daylight or adding a battery, changes the payback. The system cost stays the same in every row (a battery would add to it).

• Net system cost after incentives: €6,480 for 6 kWp.
• Incentive modelled: €720 (IRPF energy-efficiency deduction, modelled at a conservative 10% (the 40% band, base max 7,500 EUR, applies only with an A/B energy rating or >=30% non-renewable primary-energy cut)).
• 25-year net savings at our default: €25,006.

At latitude 37.39°N, PVGIS finds the fixed tilt and direction that maximise yearly output. Our figures use a common 35° roof; the table shows what the optimum adds.

In Seville a 35° roof is already at the optimum. Most of a roof's value comes from its direction: a roof facing away from the equator loses far more than a few degrees of tilt.